The authors note that they have just arrived in Provins and will continue their story of their time in Cirey. They note that they went to bed at 7am, and were made to rise three hours later at 10am to sing an opera with Émilie du Châtelet. This lasted until 1pm, when they rehearsed Zaïre, and they note that they had rehearsed 37 acts the day before, with the first three acts being rehearsed after dinner. They rehearsed Zaïre until 6pm, and note that there were constant snags, then the ladies curled their hair and dressed in a Turkish style until 9:30pm at which point the performance began. The performance of Zaïre was followed by one of l’Esprit de contradiction, which lasted until 12:30pm. The party then sat together and ate supper, failing to notice that they were violating the rights of Ash Wednesday in doing so. Graffigny and Desmarest add that they left at 8am, having performed 44 acts in 48 hours.

They discuss the various plays performed over the weekend, and provide a cast list which reads as follows: Madame Du Châtelet (Zaïre), La Grosse (styled with a Fatime veil), Voltaire (Orosmane), Mr Du Châtelet (Nerestan), his son (Corasmin), Chatillon (paper in hand). They state that the recipient does not know the other members of the cast. Graffigny and Desmarest remark that Voltaire did not know his role, being unable to perform two lines in a row whilst dressed like a chienlit. Émilie Du Châtelet, meanwhile, they note, played everything soullessly and monotonously, enough so to make one vomit. Her husband, said not a verse without stuttering. They go on to explain Voltaire’s faults in more detail: whilst the tragedy provoked tears, Voltaire is said to have known little of his role, a defect which prompted him to be impatient and attack his valet who was acting as their prompter. He is also said to have spat in the face of one of the party with fury.

The letter then turns to Voltaire’s dispute with Desfontaines, before recounting two letters received by Voltaire concerning his writings. Madame de Graffigny notes that Voltaire is beginning to work on an opera for her about Les Titans, adding that he had read them some of his Samson which she describes as as beautiful as Joseph-François Duché de Vancy’s Iphigénie en Tauride (1704). Voltaire is likewise said to have read his apology of his Mondain in the bathing apartment of Émilie Du Châtelet whilst she bathed, a reading which also included a lavish meal served at 2am in the same room by her son who had disguised himself as Love because of the carnival.